The market is frothy. Tomorrow’s USDA WASDE report could affirm today’s relatively bullish sentiment, or it could break it on fundamentals. The question is whether USDA’s corrections in yield, production and stocks go as far as current guesses. In all likelihood, there will be some disappointment, and some satisfaction. Like equities before this week, commodities have been in a little melt up. There was some positioning ahead of tomorrow but not the usual kind. It was more risk on than risk off. Buy corn and wheat, sell soy. The December corn contract is now at a five-month high despite it being harvest time and amid record global stocks. The U.S. alone is facing more than 2 billion bushels in corn ending stocks.  T...